"The quantity of pleasure is to be judged by the quantity of pain it removes."

"The truly wise man is he who does not grieve for what he has not, but rejoices in what he has."

"The just man is most free from disturbance, while the unjust is full of the utmost disturbance."

"The magnitude of pleasure reaches its limit in the removal of all pain. When that point is attained, pleasure does not further increase, but only varies in kind."

"We must not violate nature, but obey her."